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Determination of isentropic efficiency of turbomachine

An isentropic efficiency, turbine technology, applied in the field of entropy efficiency, can solve the problems of high efficiency and low temperature at the outlet, and achieve the effect of simple and reliable selection

Pending Publication Date: 2020-01-03
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature at the outlet is usually too low due to heat transfer effects, so the calculated efficiency is overall too high

Method used

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  • Determination of isentropic efficiency of turbomachine
  • Determination of isentropic efficiency of turbomachine
  • Determination of isentropic efficiency of turbomachine

Examples

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Embodiment Construction

[0024] figure 1 An apparatus for determining angular momentum of a fluid mass flow is shown. The device 1 comprises a block 2 made of a plurality of flow channels 5 , eg individual pipes 5 , arranged parallel to each other, extending linearly and connected to each other. Block 2 comprises an inlet 3 and an outlet 4 , or a first end 3 and a second end 4 . The flow direction of the fluid mass flow through the block 2 , ie in particular through the individual flow channels 5 , is identified by reference numeral 7 .

[0025] Furthermore, block 2 includes a central or longitudinal axis 6 . Block 2 is mounted such that it is rotatable about a central axis 6 . For this purpose, in the variant shown, the first bearing 8 is arranged in the region of the first end 3 and the second bearing 9 is arranged in the region of the second end 4 . Bearing 8 and bearing 9 are preferably fluid-sealed bearings. This has the effect that the fluid mass flow is guided entirely through the flow cha...

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Abstract

The application relates to determination of the isentropic efficiency of a turbomachine and discloses a method for determining the isentropic efficiency of a turbomachine (20), which comprises an axisof rotation (21), an inlet (22) and an outlet (23). The method comprises the following steps: determining the tangential velocity (cu1) of a fluid mass flow (m) at the inlet (22); directing the fluidmass flow at the outlet (23) through a block (2) which comprises a plurality of flow channels (5) arranged parallel to one another, running in a straight line and connected to one another and a longitudinal axis and is rotatably mounted about the longitudinal axis; determining the angular momentum (S) of the fluid mass flow at the outlet (23) by means of a device for determining the angular momentum (1) of the block (2); determinin the isentropic efficiency for rotating flows by means of the Euler equation from the tangential velocity (c) of the fluid mass flow at the inlet (22) and the determined angular momentum (S) of the fluid mass flow at the outlet (23).

Description

technical field [0001] The present invention relates to a method for determining the isentropic efficiency of a turbomachine (eg a turbine). Furthermore, the invention relates to a device for determining the angular momentum of a fluid mass flow, a turbine and a motor vehicle. Background technique [0002] The isentropic efficiency of turbines, especially turbines, is difficult to measure because it is based on thermodynamic equations that require inlet and outlet temperatures to calculate the enthalpy difference. However, the temperature at the outlet is usually too low due to heat transfer effects, so the calculated efficiency is overall too high. Contents of the invention [0003] It is an object of the present invention to provide an improved method for determining the isentropic efficiency of a turbomachine from the described background, which method is especially capable of determining the actual efficiency. [0004] By the method for determining the isentropic eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/26
CPCG01L3/26F02B37/00F02C6/12F05D2220/40F05D2260/80Y02T10/12
Inventor V·斯米利亚诺夫斯基H·M·金德尔J·克默林A·库斯克F·克拉默L·赫可曼F·布林克曼F·A·萨默候夫H·弗里德里希斯
Owner FORD GLOBAL TECH LLC
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